With the keys recovered in a keys.txt file, the administrator can now use a tool like libnfc to format new blank Mifare Classic cards with the old data, effectively cloning the lost credentials.
MIFARE Classic security relies on a proprietary algorithm called , which has several "hot" vulnerabilities: mifare classic card recovery tool hot
The phrase "tool hot" implies that current-generation tools are faster, cheaper, and more automated than ever. Standing on the shoulders of giants (like the Proxmark3 community), these are the top contenders: With the keys recovered in a keys